Freelancers, listen up. How many of you know how to legally establish a business, set a fair rate for yourself, get your taxes right, and invest smartly in a retirement plan? The world is quickly shifting to a “gig economy,” which means more and more people are freelancing every year. But there’s a lot to know about running a one-person business, and all kinds of risks if it isn’t done right. Where to turn for info? While The Internet has …